If the escape velocity from the surface of the Earth is 11.2 km/s, what is the escape velocity from a point located at a height equal to the radius of the Earth?

The amount of work done to raise a mass 'm' from the surface of the Earth to a height equal to the radius of the Earth 'R' will be:

A 5 kg object experiences a gravitational force of about 49 N on Earth. This implies the value of g used is approximately: